[WIP] feature/datagrid pencil edit

add the edit icon and new event in connection with the preview for contacts

__Tasks:__

- [x] add additional options for icon
- [x] check if other demos are still working
- [x] removed old demos of datagrid
- [ ] gather feedback for my changes

__Informations:__
Please doublecheck that the removed files are not needed anymore!

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| Tests pass?   | none
| Fixed tickets | none
| Doc           | none